PROTEIN AND ITS COMPOUNDS. 93 



it is procured in the same manner, from cartilage. Both are soluble 

 in hot water. Gelatin is characterized by giving a precipitate with 

 tannic acid, — tannate of gelatin. 



The different solids and fluids of the body all contain various in- 

 teresting principles, as for example, blood, vrine, chyle, bile, bones, 

 nerve-substa.nce, &c. ; but the space here allowed will not permit an 

 examination of them. In fact, they more properly come under the 

 division of Physiology, to which the student is referred for an ac- 

 count of them. 



THE END. 



